Low temperature melting and mid temperature melting lead-free solder paste with mixed solder alloy powders

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United States of America Patent

PATENT NO 11712762
SERIAL NO

17688735

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Abstract

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Implementations of the disclosure are directed to a lead-free mixed solder powder paste suitable for low temperature to middle temperature soldering applications. The lead-free solder paste may consist of: an amount of a first solder alloy powder between 44 wt % and 83 wt %, the first solder alloy powder comprising Sn; an amount of a second solder alloy powder between 5 wt % to 44 wt %, the second alloy powder comprising Sn, where the first solder alloy powder has a liquidus temperature lower than a solidus temperature of the second solder alloy powder; and a remainder of flux. The solder paste may be used for reflow at a peak temperature below the solidus temperature of the higher solidus temperature solder powder but above the melting temperature of the lower solidus temperature one.

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Patent Owner(s)

  • INDIUM CORPORATION OF AMERICA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Fen Suzhou, CN 112 767
Geng, Jie Utica, US 8 1
Lee, Ning-Cheng Utica, US 45 238
Mutuku, Francis Utica, US 2 1
Zhang, Hongwen Utica, US 18 327

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